{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T08:06:30Z","timestamp":1778573190419,"version":"3.51.4"},"reference-count":32,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2024,2,16]],"date-time":"2024-02-16T00:00:00Z","timestamp":1708041600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003725","name":"Korean government\u2019s Ministry of Education","doi-asserted-by":"publisher","award":["NRF-2021R1C1C1007795"],"award-info":[{"award-number":["NRF-2021R1C1C1007795"]}],"id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003725","name":"Korean government\u2019s Ministry of Education","doi-asserted-by":"publisher","award":["HI22C1069"],"award-info":[{"award-number":["HI22C1069"]}],"id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Ministry of Health &amp; Welfare, Republic of Korea","award":["NRF-2021R1C1C1007795"],"award-info":[{"award-number":["NRF-2021R1C1C1007795"]}]},{"name":"Ministry of Health &amp; Welfare, Republic of Korea","award":["HI22C1069"],"award-info":[{"award-number":["HI22C1069"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Bioengineering"],"abstract":"<jats:p>This study aimed to evaluate the spherical aberration (SA) in different corneal areas before and after femtosecond laser-assisted in situ keratomileusis (fLASIK) and transepithelial photorefractive keratectomy (tPRK), with the goal of identifying the limitations of and potential improvements in using SA within a 6 mm area. The study included 62 patients who underwent fLASIK and tPRK. Complete eye examinations including keratometry, corneal epithelial thickness, central corneal thickness, and topography were performed preoperatively and postoperatively. Anterior, posterior, and total corneal aberrations were measured preoperatively and three months postoperatively, with pupil diameters ranging from 2 to 8 mm. In the fLASIK group, compared to the preoperative SA, the anterior and total SA increased postoperatively in the 6 and 7 mm areas. In the tPRK group, meanwhile, the anterior and total SA of the 5 mm or larger areas increased postoperatively. An area of 6 mm or larger showed an increase in correlation with the changes in Q value and refractive correction. As the corneal SA and asphericity in the 6 mm zone cannot specifically demonstrate the status of areas smaller than 6 mm or changes in the optical zone after laser refractive surgery, comparison with normal values in various areas of the cornea is necessary.<\/jats:p>","DOI":"10.3390\/bioengineering11020190","type":"journal-article","created":{"date-parts":[[2024,2,16]],"date-time":"2024-02-16T06:00:25Z","timestamp":1708063225000},"page":"190","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Limitations of and Solutions to Using 6 mm Corneal Spherical Aberration and Q Value after Laser Refractive Surgery"],"prefix":"10.3390","volume":"11","author":[{"given":"Sung Ho","family":"Choi","sequence":"first","affiliation":[{"name":"First Samsung Eye Clinic, Seoul 06621, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yeo Kyoung","family":"Won","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Samsung Medical Center School of Medicine, Sungkyunkwan University, Seoul 06351, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sung Jin","family":"Na","sequence":"additional","affiliation":[{"name":"First Samsung Eye Clinic, Seoul 06621, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"DeokJo","family":"Nam","sequence":"additional","affiliation":[{"name":"First Samsung Eye Clinic, Seoul 06621, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dong Hui","family":"Lim","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Samsung Medical Center School of Medicine, Sungkyunkwan University, Seoul 06351, Republic of Korea"},{"name":"Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul 06351, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,2,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"565","DOI":"10.1016\/S0886-3350(00)00880-4","article-title":"Comparison of laser epithelial keratomileusis and photorefractive keratectomy for low to moderate myopia","volume":"27","author":"Lee","year":"2001","journal-title":"J. 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